From the Book, it was clear that almost everything was connected, one way or another to the War of Gods.
Every change that his world went through... and the Changes that the Nether Realm went through.
At this point, he couldn't help but think if the sudden rise of the King of the Upper Realm was also related to the Great War of Gods.
According to the Stein Clan, the King of Upper Realm rose suddenly, at the time where their clan used to reign supreme because of the inheritance. And the inheritance was given to their clan after the great war.
That made him believe that the change in the Upper Realm happened at around the same time as well.
Everything was connected with an invisible threat. However, he still couldn't see if it was all an accident, or there was a puppet master behind all this.